CN218543579U - Expansion bend for connecting replacement section submarine pipeline - Google Patents
Expansion bend for connecting replacement section submarine pipeline Download PDFInfo
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- CN218543579U CN218543579U CN202221749917.8U CN202221749917U CN218543579U CN 218543579 U CN218543579 U CN 218543579U CN 202221749917 U CN202221749917 U CN 202221749917U CN 218543579 U CN218543579 U CN 218543579U
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- expansion bend
- flange
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- expansion
- submarine pipeline
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Abstract
The utility model discloses an expansion bend for changing section submarine pipeline connection, including ball flange, first expansion bend, second expansion bend, rotating flange and welding neck flange, the expansion bend is the structure of nearly style of calligraphy, and the center of expansion bend is provided with ball flange, the both ends of ball flange are connected the one end of first expansion bend and the one end of second expansion bend respectively, the other end of first expansion bend and the other end of second expansion bend all are provided with rotating flange, rotating flange is connected with the welding neck flange that is fixed in submarine pipeline; this curved connection design of inflation, the installation degree of difficulty is low, and the risk is controllable.
Description
Technical Field
The utility model relates to an ocean engineering field particularly, especially relates to an inflation is bent for changing section submarine pipeline and connect.
Background
For the failure reasons of the submarine pipeline, research and investigation at home and abroad show that the failure reasons mainly comprise factors such as third party activities, corrosion, natural factors (factors such as geology, extreme climate and the like), material/welding/pipe fitting defects, improper operation and other unknown reasons. With the increase of ocean development strength, external force damage caused by third-party activities becomes the first major factor of failure accidents of submarine pipelines, the occupation ratio continuously rises, and the specific forms of damage to submarine pipelines are shown as anchor damage, sand digging operation, shipping, fishery operation and the like. If the pipeline is damaged and fails, and the pipeline is broken, deformed, corroded in a large range and the like, the pipeline needs to be cut and replaced as soon as possible, and loss caused by production stop is reduced.
For submarine pipelines, when buckling, thermal insulation failure, water inflow and the like occur in the middle section of a route due to external force factors, a long section of pipeline section needs to be cut and recovered, then submarine pipelines are laid again for replacement, the scheme of connecting sections of the submarine pipelines at two ends is influenced by factors such as laying precision and the like, the submarine pipelines at two sides are not on the same axis, the straight-line-shaped straight-line section scheme has high difficulty for underwater connection operation wind, and once installation is difficult, construction period delay is caused, and risk is high; for the zigzag scheme, the route of two pipe segments needs to be redesigned, so that the design time is long, and the requirement of the construction period can not be met.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a can make change section submarine pipeline connect more convenient inflation curved.
In order to solve the technical problem, the utility model provides an it is curved to expand for changing section submarine pipeline connects, including ball flange, the curved, rotatory flange of second inflation and the welding neck flange of first inflation, the curved structure that is nearly style of calligraphy of expansion, the curved center of inflation is provided with ball flange, the curved one end of first inflation and the curved one end of second inflation are connected respectively to ball flange's both ends, the curved other end of first inflation with the curved other end of second inflation all is provided with rotatory flange, rotatory flange is connected with the welding neck flange that is fixed in submarine pipeline.
According to a preferred embodiment of the invention, the bending angle of the expansion bend is 90 °.
According to a preferred embodiment of the present invention, the first expansion bend and the second expansion bend are symmetrically distributed on both sides of the ball flange.
According to a preferred embodiment of the present invention, the first expansion bend and the second expansion bend are each a zigzag structure.
According to a preferred embodiment of the invention, the first expansion bend is an open-section expansion bend.
According to a preferred embodiment of the invention, the second expansion bend is a closed section expansion bend.
The technical effects of the utility model reside in that:
1. the utility model relates to an inflation is curved for changing section submarine pipeline connects adopts nearly style of calligraphy design, and the installation degree of difficulty is low, can make and change section submarine pipeline and connect more convenient to the risk is controllable, has shortened submarine pipeline route redesign's cycle.
2. The utility model relates to an inflation is curved for changing section submarine pipeline connects, changes section submarine pipeline and has realized the monolithic connection through this inflation is curved, and this inflation is curved can absorb both ends submarine pipeline's thermal expansion volume, will regard as submarine pipeline's partly transport medium during the operation, changes section submarine pipeline and connects the inflation curved ball flange that sets up, revises the angular deviation of submarine pipeline tube head, has eliminated the curved flange group of inflation that the error was brought and has just been laid to difficult risk.
Drawings
Fig. 1 is a general schematic view of an expansion bend for a replacement section subsea pipeline connection according to the present invention;
fig. 2 is a schematic view of a first expansion bend of the present invention for use in a replacement section subsea pipeline connection;
fig. 3 is a schematic view of a second expansion bend of the present invention for use in a replacement section subsea pipeline connection;
FIG. 4 is a schematic view of a first section of a subsea pipeline end of the present invention used to replace an expansion bend of a section of a subsea pipeline connection;
FIG. 5 is a schematic view of a second section of a subsea pipeline end of the present invention used to replace the expansion bend of a section of a subsea pipeline connection;
fig. 6 is an overall view of the installation of the expansion bend of the present invention for a replacement section subsea pipeline connection.
Reference numerals: 1-a first expansion bend; 2-second expansion bend; 3-a first section of subsea pipeline; 4-a second section of subsea pipeline; 5-a ball flange; 6-welding a neck flange; 7-rotating the flange.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not limited to the present invention.
As shown in fig. 1 to 6, an expansion bend for connecting a replacement section of a submarine pipeline comprises a ball flange 5, a first expansion bend 1, a second expansion bend 2, a rotating flange 7 and a welding neck flange 6, wherein the expansion bend is of a n-shaped structure, the ball flange 5 is arranged at the center of the expansion bend, two ends of the ball flange 5 are respectively connected with one end of the first expansion bend 1 and one end of the second expansion bend 2, the other end of the first expansion bend 1 and the other end of the second expansion bend 2 are both provided with the rotating flange 7, and the rotating flange 7 is connected with the welding neck flange 6 fixed on the submarine pipeline.
As shown in fig. 1, the bending angles of the expansion bends are both 90 °, and the first expansion bend 1 and the second expansion bend 2 are symmetrically distributed on two sides of the ball flange 5.
As shown in fig. 2 and 3, the first expansion bend 1 and the second expansion bend 2 are both in a zigzag structure, the first expansion bend 1 is an open section expansion bend, and the second expansion bend 2 is a closed section expansion bend.
As shown in fig. 1 to 6, the expansion bend for replacing the connection of the section of the submarine pipeline is of a shape like a Chinese character 'ji', all bent pipes have 90 degrees, and comprises a first expansion bend 1 and a second expansion bend 2 which are symmetrically arranged, the middle of the first expansion bend 1 and the second expansion bend 2 are connected by a spherical flange 5, the first expansion bend 1 and the second expansion bend 2 are symmetrically distributed on two sides of the spherical flange 5, and the end parts of the first expansion bend 1 and the second expansion bend 2 are provided with rotating flanges 6 to be connected with a welding neck flange 7 at the end of a submarine pipe.
The expansion bend main body is composed of two expansion bends, wherein the first expansion bend 1 is an open expansion bend, and the second expansion bend 2 is a closed expansion bend, and is respectively connected with the submarine pipeline and used as a component of the integral submarine pipeline.
The end parts of the opening section and the closed section of the expansion bend are respectively provided with a rotating flange 7 which is connected with a newly laid sea pipe with a welding neck flange 6.
The open section and the closed section of the expansion bend are connected through a spherical flange 5 and symmetrically arranged on two sides of the spherical flange 5, the expansion bend of the open section is prefabricated according to a design drawing, and the expansion bend of the closed section is prefabricated by combining field measurement feedback data on the basis of the design drawing.
The expansion bend overall configuration is verified by finite element analysis, and the requirements of absorbing expansion amount of the sea pipes at two ends and relevant allowable strength are met.
The installation mode is as follows: laying a flange pipe on a first section of submarine pipeline 3, then carrying out laying termination operation, calculating the flange position of a second section of submarine pipeline 4 according to the underwater position of the flange of the first section of submarine pipeline 3 and an expansion bending drawing, measuring the actual positions of the flange pipe and a cutting point through a positioning drawing, namely the length of the submarine pipeline to be laid, measuring the length of each submarine pipeline when the second section of submarine pipeline 4 starts to be laid, determining the length of a final adjusting pipe, carrying out laying termination operation after welding all submarine pipelines, installing a laying termination dragging end socket, lowering the submarine pipeline laying to the seabed according to the calculation and analysis steps, carrying out launching investigation and recording the position coordinates of the flange, and releasing a pipe abandoning hook, namely finishing the laying of the submarine pipelines at two ends of a replacement section.
Placing the expansion bend of the open section to a target position, assembling the flanges by using tools such as a steel chisel, a flange catcher, a floating bag, a lever block and the like, and completing the expansion bend installation of the open section; and then measuring the closed section expansion bend, mainly measuring the distance between flanges, adjusting the designed horizontal section and vertical section length of the closed section expansion bend according to the fed-back actual measurement data, prefabricating, finally putting the closed section expansion bend into a target position, assembling the closed section expansion bend with the open section expansion bend and a flange of a second section of submarine pipeline 4, and completing the installation of the closed section expansion bend, wherein the open section and the closed section expansion bend are connected by using a spherical flange 5 with bidirectional ball passing capability to correct the angle deviation of the submarine pipeline head, the difficult risk of flange assembly of the expansion bend caused by submarine pipeline laying errors is eliminated, the construction period delay is avoided, and the expansion bend of the submarine pipeline at the replacement section is considered to be connected.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitution or transformation made by the technical personnel in the technical field on the basis of the utility model is within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.
Claims (6)
1. The expansion bend for replacing the connection of the submarine pipeline comprises a ball flange, a first expansion bend, a second expansion bend, a rotating flange and a welding neck flange, and is characterized in that the expansion bend is of a structure shaped like a Chinese character 'ji', the ball flange is arranged at the center of the expansion bend, two ends of the ball flange are respectively connected with one end of the first expansion bend and one end of the second expansion bend, the other end of the first expansion bend and the other end of the second expansion bend are respectively provided with the rotating flange, and the rotating flange is connected with the welding neck flange fixed on the submarine pipeline.
2. An expansion bend for a replacement section of a subsea pipeline connection according to claim 1, characterized in that the elbow angles of the expansion bend are both 90 °.
3. Expansion bend for a replacement section subsea pipeline connection according to claim 1, characterized in that the first expansion bend and the second expansion bend are symmetrically distributed on both sides of the spherical flange.
4. An expansion bend for use in a replacement section of subsea pipeline connection according to claim 1, wherein said first and second expansion bends are of zigzag configuration.
5. Expansion bend for a replacement section of a subsea pipeline connection according to claim 1, characterized in that said first expansion bend is an open section expansion bend.
6. Expansion bend for a replacement section subsea pipeline connection according to claim 1, characterized in that said second expansion bend is a closed section expansion bend.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221749917.8U CN218543579U (en) | 2022-07-06 | 2022-07-06 | Expansion bend for connecting replacement section submarine pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221749917.8U CN218543579U (en) | 2022-07-06 | 2022-07-06 | Expansion bend for connecting replacement section submarine pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218543579U true CN218543579U (en) | 2023-02-28 |
Family
ID=85266220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221749917.8U Active CN218543579U (en) | 2022-07-06 | 2022-07-06 | Expansion bend for connecting replacement section submarine pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218543579U (en) |
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2022
- 2022-07-06 CN CN202221749917.8U patent/CN218543579U/en active Active
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